Number Triangle Design

Q. Write a C program to print the following number triangle or pyramid design as:

1
121
12321
1234321

Ans.

/*c program for number triangle design*/
#include<stdio.h>
int main()
{
 int num,r,c,z;
 printf("Enter any number : ");
 scanf("%d", &num);

 for(r=1; r<=num; r++)
 {
  for(c=1; c<=r; c++)
     printf("%d",c);
  for(z=r-1; z>=1; z--)
     printf("%d",z);
  printf("\n");
 }
 getch();
 return 0;
}

The output of above program would be:

Figure : Screen shot for Number Triangle C program

Learners also read:

1. Character Triangle pattern as:

A
ABA
ABCBA
ABCDCBA
ABCBA
ABA
A